Update README

README.md

@@ -10,7 +10,7 @@ Experimental JavaScript library to measure blur in images. See this [blog post](
 1. Make sure [Cairo](http://cairographics.org/) is installed in your system, the [canvas](https://github.com/Automattic/node-canvas) module requires this. [How to install node-canvas](https://github.com/Automattic/node-canvas/wiki).
    * On OS X with [Homebrew](http://brew.sh/): `brew install pkg-config cairo pango libpng jpeg giflib`
 1. `npm install`
-1. `node measure_blur.js path/to/image/file.jpg`
+1. `node measure_blur_node.js path/to/image/file.jpg`
 
 ## Prepare and run browser demo - under construction
 1. `npm install`